[gmx-users] System has non-zero total charge: 2.570000e+00

[najwa drici]

hello Gromacs users,
I have some problems about the total charge of system using Gromacs.
I wanted to perform molecular dynamic simulation in box of SPC water. 

 

before energy minimization step , I performed the preprosessing step using grompp  . However, there’s a note that : System has non-zero total charge: 2.570000e+00 “.
why the total charge of system is not an integer?

thank you

nejoua DRICI 


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